Rhode Island NPDES permit search
Status, expiry and violations for 14 municipal wastewater permits · issued by RIDEM as RIPDES permits
In short
How do I look up an NPDES permit in Rhode Island?
Search this page by permit number or plant name for a municipal plant’s permit status, expiry date and violations. For the official file, search EPA’s list of Rhode Island permits or the RIDEM Environmental Resource Map. EPA’s ECHO database shows the monitoring results and violations of every permit. The 138 industrial permits in Rhode Island are listed in Klarifi with a free account.
Links to official sources checked September 2026.
Effective
9
Administratively continued
5
Expired
0
Plants with effluent violations, 3 years
13
Where to find official Rhode Island NPDES records
Rhode Island Department of Environmental Management (RIDEM) runs the NPDES program in Rhode Island under authorization from EPA Region 1, as the Rhode Island Pollutant Discharge Elimination System (RIPDES). It issues and enforces the permits and keeps the official file: applications, permits, fact sheets and monitoring reports. EPA New England issues the permits on tribal lands. RIDEM website ↗
permits · permit documents
RIDEM points to this EPA-hosted table of final RIPDES permits. Type the town, facility name or permit number (for example RI0023485) and click the facility for the permit.
permits
Accept the terms, switch on the Regulated_Facilities layer and click a RIPDES point for the facility, permit number, status and dates.
permits · DMRs · inspections · violations · enforcement
EPA’s Enforcement and Compliance History Online. Search water facilities by permit number, name or city; the Detailed Facility Report lists inspections, violations and enforcement actions, and Effluent Charts plot monitoring results against the permit limits.
- Discharge monitoring reports
- Through EPA’s NetDMR, to RIDEM.
- Violations and enforcement
- RIDEM’s formal enforcement action summaries ↗
Industrial and commercial NPDES permits in Rhode Island
Most NPDES permits are not held by municipal plants. EPA’s permit database lists 138 individual permits in force for industrial and commercial facilities in Rhode Island (manufacturers, food processors, mines, power plants, landfills), 4 of them major dischargers, plus 611 facilities covered by a general permit, mostly for stormwater. 25 of the individual permits recorded at least one effluent violation in the last three years.
| Facility | Permit | Status | Expires | Effluent violations |
|---|
Unlock 138 industrial permits in Rhode Island
Search every industrial and commercial discharger in Rhode Island by name or permit number, with permit status, expiry and violation history. Free with a Klarifi account.
Industrial and commercial NPDES permits in Rhode Island: permits in force (effective or administratively continued) held by facilities EPA does not class as publicly owned treatment works or federal facilities. Source: EPA ICIS-NPDES via Klarifi, October 2026.
Violations at Rhode Island wastewater plants
13 of the 14 municipal plants on this page recorded at least one effluent violation, a monitored value above a permit limit, in the last three years, and 14 had a violation of any kind, including late or missing monitoring reports. Each plant’s page shows its own count. EPA’s enforcement records list 13 formal cases naming Rhode Island wastewater plants, 0 of them since fiscal year 2020, with $283,000 in penalties assessed. Enforcement cases in Rhode Island →
Permit renewals by year
An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.
2026: 2 permits
2028: 3 permits
2029: 3 permits
2030: 3 permits
Largest permit holders in Rhode Island
| Facility | City | Avg flow (MGD) | Design (MGD) | NPDES permit | Status | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| Narragansett Bay Commission Bucklin Point | East Providence (rumford) | 17.77 | — | RIR50T002 | Effective | Aug 2029 | 8 |
| East Providence WWTF | East Providence | 5.45 | 14.2 | RI0100048 | Effective | Sep 2028 | 70 |
| Newport Water Pollution Control Facility | Newport | 7.15 | 10.7 | RI0100293 | Administratively continued | May 2020 | 24 |
| Cranston Water Pollution Control Facility | Cranston | 7.48 | — | RIL100013 | Effective | Dec 2030 | 5 |
| Bristol Wastewater Treatment Facility | Bristol | 3.17 | 3.79 | RI0100005 | Effective | Mar 2028 | 26 |
| Smithfield Wastewater Treatment Plant | Smithfield | 1.64 | 3.5 | RI0100251 | Administratively continued | Jun 2026 | 2 |
| Warren WWTF | Warren | 1.78 | 3.43 | RI0100056 | Effective | Dec 2030 | 56 |
| Westerly Wastewater Treatment Facility | Westerly | 1.97 | 3.3 | RI0100064 | Administratively continued | Sep 2026 | 7 |
| Quonset Point Wastewater Treatment Facility | North Kingstown | 0.6 | 1.78 | RI0100404 | Effective | Dec 2030 | 74 |
| East Greenwich WWTF | East Greenwich | 0.82 | 1.7 | RI0100030 | Administratively continued | Sep 2023 | 31 |
Rhode Island NPDES permits: questions
NPDES permit search in other states
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 12, 2026.
Wastewater terms: NPDES permit · POTW · Significant industrial user · MGD · Anaerobic digester · Lift station · all terms